During the late 19th century, which of the following practices would have been used by the knights of labor?

a. boycotts and closed shops
b. boycotts and scabs
c. lockouts and scabs
d. yellow-dog contracts and closed shops

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another?focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery?question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.